42020424 has 64 divisors (see below), whose sum is σ = 117374400. Its totient is φ = 13928832.

The previous prime is 42020393. The next prime is 42020437. The reversal of 42020424 is 42402024.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 42020397 and 42020406.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48604 + ... + 49460.

It is an arithmetic number, because the mean of its divisors is an integer number (1833975).

Almost surely, 2^42020424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42020424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58687200).

42020424 is an abundant number, since it is smaller than the sum of its proper divisors (75353976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42020424 is a wasteful number, since it uses less digits than its factorization.

42020424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099 (or 1089 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 42020424 is about 6482.3162526986. The cubic root of 42020424 is about 347.6590000946.

Adding to 42020424 its reverse (42402024), we get a palindrome (84422448).

The spelling of 42020424 in words is "forty-two million, twenty thousand, four hundred twenty-four".